|Authors:||James F. Kurose, Keith W. Ross|
|Chapter:||The Network Layer|
Let’s review some of the terminology used in this textbook. Recall that the name of a transport-layer packet is segment and that the name of a link-layer packet is frame. What is the name of a network-layer packet? Recall that both routers and link-layer switches are called packet switches. What is the fundamental difference between a router and link-layer switch? Recall that we use the term routers for both datagram networks and VC networks.
The name of a network-layer packet is “Datagram”.
The fundamental difference between a router and link-layer switch as
A router forwards a packet based on the packet’s IP (layer 3) address.
A link-layer switch forwards a packet based on the packet’s MAC (layer address.